of or from or pertaining to or characteristic of the cosmos or universe
"cosmic laws"
"cosmic catastrophe"
"cosmic rays"
inconceivably extended in space or time
"The cosmic timeline stretches back billions of years, far beyond human comprehension."
Of or from or pertaining to the cosmos or universe.
"The cosmic rays streaming through space are invisible particles that originate from distant stars and galaxies."
In plain English: Cosmic means relating to the universe as a whole, including all stars and galaxies.
"The cosmic rays from space are invisible but can affect our electronics."
Usage: Use cosmic when describing phenomena that involve the entire universe, such as cosmic rays or cosmic dust. Avoid using it simply because something is large; instead, ensure the subject relates directly to space and celestial bodies.
The word cosmic comes from the Ancient Greek kosmikos, which originally meant "ordered" or "arranged." It entered English through French to describe things related to the universe as a whole.